That was creepy!! I gave up after repeatedly dying in the second level. I love the sound effects, especially "I will eat youuuuuuuuuu" The screen flickered a lot and sometimes there were white streaks going all over the place :S

I get the same flashing effects and random white lines from time to time (Core i7 2600, Radeon 5870, Windows 7 64bit, Java 7). On the second level, black vertical lines were added to the mix. In addition, i somehow managed to break to the collision detection in level 2 and could pass freely through the walls: http://jpct.de/stuff/rooms.jpg

-Djava.library.path="C:\full path to natives with support for spaces\"I think he sets the library path in his program too though, as it works by just double-clicking/running it without a user defined path.

@loom_weaverThat's a problem with LWJGL on some Macs. Try using the latest nightly build of LWJGL instead. (Beware, the OP puts the lwjgl files in the jar so you will have to unzip, replace, and re-zip)